A regulatory network involving Foxn4, Mash1 and delta-like 4/Notch1 generates V2a and V2b spinal interneurons from a common progenitor pool. - Del Barrio MG; Taveira-Marques R; Muroyama Y; Yuk DI; Li S; Wines-Samuelson M; Shen J; Smith HK; Xiang M; Rowitch D; Richardson WD (Development (Cambridge, England), 2007)